Filter cartridge pull-out device



Jan. 17, 1956 w. 5. JAMES FILTER CARTRIDGE PULL-OUT DEVICE Filed March 27, 1953 FIGB FIG.2

R WWW ms WE NE N E R VM 0 m W United States Patent FILTER CARTRIDGE PULL-OUT DEVICE William S. James, Providence, R. I., assignor to Fram Corporation, a corporation of Rhode Island Application March 27, 1953, Serial No. 345,183

2 Claims. (Cl. 210-169) This invention relates to a device for removing a cartridge from its filter case and is designed particularly for the removal of a cartridge of cylindrical form by a movement of the cartridge axially from a filter case.

Various handles, tabs, and other arrangements have been attached to the end of a filter cartridge so as to assist in the removal of the cartridge from a casing when the cartridge has been spent. The attachment of such devices to a cartridge is expensive and increases the cost ofproducing the cartridge. Also it usually requires a separate operation to be performed after the cartridge is otherwise complete, which necessitates handling the complete cartridge in order to attach the handle device. Also, such handles as have heretofore been used usually serve no other function in the filter or casing than for use as a pull-out handle.

One of the objects of this invention is to provide a pullout device which may be assembled with the cartridge top prior to its assembly in closing the cartridge so that the pull-out device need not be applied after the cartridge is otherwise complete, which is of importance from a manufacturing standpoint.

Another object of this invention is to provide a cartridge pull-out device which also may serve as an installation gasket in the sealing of the cartridge in position in its casing.

Another object of this invention is to provide a pull-out device which may be inexpensively constructed and thus of low cost to install in the cartridge.

More specifically, an object of this invention is to provide a disc-like member which may be folded up into a form to act as a handle for pulling the cartridge from its casing.

A still further object of this invention is to provide a paper disc which may have tabs extending beyond the sides of the cartridge affording easy access to the portions which may be swung up into the position of a handle for grasping to lift the cartridge from its casing.

With these and other objects in view, the invention consists in certain novel features of construction, as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

Fig. 1 is a perspective view of a cartridge equipped with this invention.

Fig. 2 is a perspective fragmental view of the upper end of the cartridge with the handle device bent upwardly into operating position.

Fig. 3 is a top plan view of the disc which provides the handle member.

In proceeding with this invention, I utilize a cylindrical cartridge and attach to the upper end of this cartridge a disc which is scored and cut through so as to provide a center section which may be attached rigidly to the upper end of the cartridge and two sections, one at either side of this center section each of which has a hinge relation with this center section by reason of score lines in the disc so that it may be bent up from a position in a single plane to a generally U shaped position for easy grasping to lift the cartridge from its casing. The center section may be attached to the upper end of the cartridge in any suitable way.

With reference to the drawing, 10 designates generally a cartridge which for the purposes of this invention may take any one of a number of difierent forms. That which is shown here for illustrative purposes comprises a cylindrical wall 11 of metal which is stiffened by the formation of internally extending deflections 12 providing ribs on its internal surface and depressions on its external surface. Perforations 13 are provided at various points along the wall 11 so that the liquid to be filtered may enter the cartridge through these openings. In the present form of cartridge there is provided within this wall 11, and between it and a perforated metal tube M, an annulus of pleated paper, the internal ribs being utilized for holding the paper away from the wall for circulation of the liquid to be filtered in the cartridge.

The pleated paper within the wall 11 has an axial length slightly greater than the wall 11 and is sealed at either end by a disc or cap 15 of paper or the like by use of some suitable adhesive. A similar disc or cap 16 seals the lower end of the pleated paper annulus.

The handle device which is the subject of this invention comprises, as shown in Fig. 3, a disc 17 having a periphery at 18 which is substantially the same size as the periphery of the end sealing disc 15. The disc has a center opening 19 for registration with the center tube 14 and is cut through along arcuate lines 20 and 21 which are concentric with the opening 19. From the ends of these lines 2% and 21 there extend parallel score lines 22 and 23 out to the periphery 18. Thus I provide a center section 24 between the score lines 22 and 23 which I secure to the disc 15 in any suitable manner, such for instance as by staples 25, thus leaving arcuate sections 26 and 26 at either side of this center section 24 which may be swung about the score lines 22 and 23 as a hinge so that these sections 26 and 26 may be swung up at right angles to the section 24 from the position shown in Fig. l to the position shown in Fig. 2. By reason of the arcuate cut-throughs 20 and 21, a space 27 is formed so that a hook or a finger or some other instrument may be inserted for pulling the cartridge out of its casing.

Also to assist in the lifting of the sections 26 and 26 from their position as shown in Fig. 1, I have provided tabs 28 and 28 extending radially outwardly at diametrically opposite points and at right angles to the score lines 22 and 23, which are of an extent to protrude beyond the wall 11 of the cartridge and provide a means which may be easily grasped by the hand or by some instrument for more easily swinging the sections 26 and 26 to their position as shown in Fig. 2.

l have found it convenient in the particular cartridge here illustrated to use a paper material for the disc 35 which seals the upper end of the pleated annulus and i have also found it convenient to use a paper or cardboard sheet material member 17 and provide the cut and score lines 22 and 23 therein. However, it will be readily understood that the rnember 17 need not be of the same material as the disc 15 and may be metal or any other material so long as it has the proper strength to function in the manner above described. It is, however, convenient to use a soft gasket-like material for the member 17 so that it may be used as an installation gasket in installing the cartridge in its casing.

It will be readily apparent that this member 17 may be attached to the sealing member 15 prior to the securing of the sealing member 15 in position.

I claim:

1. A filter cartridge comprising an annular filter body, a flat cap secured to each end of the filter body, a paper disc secured to the outer face of one of said caps and shaped to cover and protect this cap, the adjacent disc and cap having aligned central holes adapted to fit around a center tube and the paper disc being sufficiently yieldable to serve as an installation gasket, said disc having a central section strongly secured to its cap and having side sections that are scored to form handles attached to the central section by scored hinge lines, whereby the disc forms a cover that protects the cap when shipped and the side sections may be swung outwardly to form baillike handles that serve as pull-out devices for the cartridge.

4 2. A filter cartridge as in claim 1 wherein the cap as well as the disc attached thereto are formed of paper.

References Cited in the file of this patent UNITED STATES PATENTS 2,218,800 Williams Oct. 22, 1940 2,317,067 Knaust Apr. 20, 1943 2,378,750 Carew June 19, 1945 2,453,393 Wilson Nov. 9, 1948 2,642,187 Bell June 16, .1953 2,661,142 Hendrickson Dec. 1, 1953 FOREIGN PATENTS 752,811 France Sept. 30, 1933 754,155 France Nov. 2, 1933 

